*{
    margin:0;
    padding:0
}
.contianer{
    display: flex;
    width: 100vw;
    min-height: 900px;
    background-color: #f5f5f5;
}
.silder{
    width: 200px;
    height: 900px;
    background-color: #001529;
}

.header{
    width: calc(100vw - 200px);
    height: 50px;
    background-color: #ccc;
}